SI5338K-B05623-GM Silicon Labs

Si5338 2 I C-PROGRAMMABLE ANY-FREQUENCY, ANY-OUTPUT QUAD CLOCK GENERATOR Features Low power MultiSynth technology Single supply core with excellent enables independent, any-frequency PSRR: 1.8, 2.5, 3.3 V synthesis on four differential output Independent frequency increment/ drivers decrement feature enables PCIe Gen 1/2/3/4 Common Clock and glitchless frequency adjustments in Gen 3 SRNS compliant 1 ppm steps Highly-configurable output drivers with Independent phase adjustment on up to four differential outputs, eight each of the output drivers with an single-ended clock outputs, or a accuracy of <20 ps steps Ordering Information: combination of both Highly configurable spread Low phase jitter of 0.7 ps RMS typ spectrum (SSC) on any output: See page 42. High precision synthesis allows true Any frequency from 5 to 350 MHz Any spread from 0.5 to 5.0% zero ppm frequency accuracy on all Any modulation rate from 33 to outputs Pin Assignments 63 kHz Flexible input reference: External feedback mode allows External crystal: 8 to 30 MHz zero-delay mode CMOS input: 5 to 200 MHz Top View Loss of lock and loss of signal SSTL/HSTL input: 5 to 350 MHz alarms Differential input: 5 to 710 MHz 2 Independently configurable outputs I C/SMBus compatible interface support any frequency or format: 24 23 22 21 20 19 Easy to use programming software LVPECL/LVDS: 0.16 to 710 MHz IN1 1 18 CLK1A Small size: 4 x 4 mm, 24-QFN HCSL: 0.16 to 250 MHz Low power: 45 mA core supply typ 2 17 IN2 CLK1B CMOS: 0.16 to 200 MHz Wide temperature range: 40 to SSTL/HSTL: 0.16 to 350 MHz 3 16 IN3 VDDO1 GND +85 C GND Independent output voltage per driver: Pad IN4 4 15 VDDO2 1.5, 1.8, 2.5, or 3.3 V 5 14 IN5 CLK2A Applications 6 13 IN6 CLK2B 7 8 9 10 11 12 Ethernet switch/router Any-frequency clock conversion PCIe Gen1/2/3/4 MSAN/DSLAM/PON Broadcast video/audio timing Fibre Channel, SAN Processor and FPGA clocking Telecom line cards 1 GbE and 10 GbE Description The Si5338 is a high-performance, low-jitter clock generator capable of synthesizing any frequency on each of the device s four output drivers. This timing IC is capable of replacing up to four different frequency crystal oscillators or operating as a frequency translator. Using its patented MultiSynth technology, the Si5338 allows generation of four independent clocks with 0 ppm precision. Each output clock is independently configurable to support various signal formats and supply voltages. The Si5338 provides low-jitter frequency synthesis in a 2 space-saving 4 x 4 mm QFN package. The device is programmable via an I C/ SMBus-compatible serial interface and supports operation from a 1.8, 2.5, or 2 3.3 V core supply. I C device programming is made easy with the ClockBuilder Desktop software available at www.silabs.com/ClockBuilder. Measuring PCIe clock jitter is quick and easy with the Silicon Labs PCIe Clock Jitter Tool. Download it for free at www.silabs.com/pcie-learningcenter. Rev. 1.6 12/15 Copyright 2015 by Silicon Laboratories Si5338 VDD VDD INTR RSVD GND CLK3B CLK0A CLK3A CLK0B VDDO3 VDDO0 SCL SDASi5338 Functional Block Diagram VDD Synthesis Output Synthesis Osc noclk Stage Stage 1 Stage 2 VDDO0 (PLL) P1DIV IN IN1 MultiSynth CLK0A ref R0 IN2 P1 M0 CLK0B IN3 VDDO1 Loop VCO Phase Filter MultiSynth CLK1A Frequency R1 M1 P2DIV IN Detector CLK1B fb IN4 P2 VDDO2 IN5 noclk IN6 MultiSynth CLK2A R2 M2 CLK2B MultiSynth Control & Memory N VDDO3 OEB/PINC/FINC CLK3A I2C LSB/PDEC/FDEC MultiSynth R3 M3 NVM Control RAM CLK3B SCL (OTP) SDA INTR 2 Rev. 1.6